Checklists for software errors, setup, and tool workflows.

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Fix PostgreSQL Connection Refused on Port 5432

When you see psql: error: connection to server at ... failed: Connection refused on ...

Fix Windows Search 504 Gateway Timeout Error

You open Windows Search, type a query, and instead of results you see a 504 gateway timeout error...

Fix Jupyter Notebook Token Not Working on Localhost

If you see a token prompt when opening Jupyter Notebook on localhost, and entering the token fail...

Fix Microsoft Teams Network Error on Windows 10

You launch Microsoft Teams on Windows 10 and see a persistent network error message: "Can't reach...

How to Fix Windows Defender Path Not Found Error

You open Windows Defender Security Center or try to run a scan, and you see an error: Pat...

Fix Microphone Not Working in Microsoft Teams on Ubuntu
If your microphone isn't working in Microsoft Teams on Ubuntu, you're not alone. This is a common...